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Method for improving luminescence performance of aluminate long-afterglow material by platinum

A long afterglow material and long afterglow luminescence technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unobvious afterglow performance, large particles, unfavorable afterglow performance of luminescent powder, etc., and achieve high long afterglow luminescence performance, synthetic The effect of simple process and convenient industrial mass production

Inactive Publication Date: 2018-08-17
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with other preparation methods, this method is simple to operate and the product has good crystallinity, but the particles are generally relatively large. In the application, it needs to be crushed to obtain, and the crushing will have a great impact on the luminescent performance, which is not conducive to maintaining the original luminescent powder. Some afterglow properties, using chemical preparation methods can directly prepare luminescent powder with smaller particle size, which is conducive to maintaining the original luminous properties of luminescent powder, spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ Long afterglow luminescent material is one of them, but the improvement of afterglow performance is not obvious

Method used

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  • Method for improving luminescence performance of aluminate long-afterglow material by platinum
  • Method for improving luminescence performance of aluminate long-afterglow material by platinum
  • Method for improving luminescence performance of aluminate long-afterglow material by platinum

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Experimental program
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Effect test

Embodiment 1

[0032] Step 1. Using carbon spheres as templates, spherical Sr was obtained by coprecipitation-hydrothermal method 4 al 14 o 25 :Eu 2+ , Dy 3+ precursor, and then sintered in a reducing atmosphere for 2 h at a firing temperature of 900 °C to obtain spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ luminous powder;

[0033] Step 2, Spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in an ultrasonic instrument for 7 minutes, filter after the ultrasonic is completed, and dry in an oven at 150°C for 16 minutes;

[0034] Step 3, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.01mmol L -1 ;

[0035] Step 4, 2ml of H obtained in step 3 2 PtCl 6 Solution, acetic acid and alcohol are mixed according to 1:4:500 to form a uniform solution;

[0036] Step 5: Pour 0.2 g of the luminescent powder obtained in step 2 into ...

Embodiment 2

[0042] Step 1. Using carbon spheres as templates, spherical Sr was obtained by coprecipitation-hydrothermal method 4 al 14 o 25 :Eu 2+ , Dy 3+ precursor, and then sintered in a reducing atmosphere for 2 h at a firing temperature of 1000 °C to obtain spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ luminous powder;

[0043] Step 2, Spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 10 minutes, filter after the ultrasonic is completed, and dry in an oven at 135°C for 20 minutes;

[0044] Step 3, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.1mmol L -1 ;

[0045] Step 4, 2ml of H obtained in step 3 2 PtCl 6 Solution, acetic acid and alcohol are mixed according to 1:7:500 to form a uniform solution;

[0046] Step 5: Pour 1 g of the luminescent powder obtained in step 2 into ...

Embodiment 3

[0049] Step 1. Using carbon spheres as templates, spherical Sr was obtained by coprecipitation-hydrothermal method 4 al 14 o 25 :Eu 2+ , Dy 3+ precursor, and then sintered in a reducing atmosphere for 3 h at a firing temperature of 1100 °C to obtain spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ luminous powder;

[0050] Step 2, Spherical Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in an ultrasonic instrument for 8 minutes, filter after the ultrasonic is completed, and dry in an oven at 100°C for 19 minutes;

[0051] Step 3, the H 2 PtCl 6 Dissolved in alcohol to form a homogeneous solution, where H 2 PtCl 6 The molar concentration is 0.15mmol L -1 ;

[0052] Step 4, 1ml of H obtained in step 3 2 PtCl 6 Solution, acetic acid and alcohol are mixed according to 7:5:500 to form a uniform solution;

[0053] Step 5, pour 1g of the luminescent powder obtained in step 2 into th...

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Abstract

The invention discloses a method for improving a luminescence performance of an aluminate long-afterglow material by platinum. The method includes that by adsorption of H2PtCl6 on the surface of spherical Sr4Al14O25:Eu<2+>,Dy<3+> luminescent powder, platinum particles are loaded on the surface of the luminescent powder through photo-reduction reaction to obtain a platinum surface loaded Sr4Al14O25:Eu<2+>,Dy<3+> long-afterglow luminescent material, and accordingly the luminescence performance of the aluminate long-afterglow material is improved. By loading of the platinum particles on the surface of the Sr4Al14O25:Eu<2+>,Dy<3+> luminescent powder, a material photoresponse range, light absorbing intensity and quantum efficiency are effectively improved, and accordingly the afterglow performance is remarkably improved. In addition, the method is simple in synthesis process, high in operability and convenient for industrial large-scale production, and the prepared material has the great long-afterglow luminescence performance and is expected to create high social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a method for improving the luminous performance of aluminate long-lasting luminescent materials by utilizing platinum. Background technique [0002] Long afterglow luminescent materials can absorb natural light, lighting and other light sources, store energy, release it slowly, and achieve continuous luminescence. It is an important energy-saving and environmentally friendly material. Long-lasting luminescent materials have characteristic absorption peaks and emission peaks, and can store energy, so they have strong application prospects in radiation monitoring, biomedicine, photocatalysis and other fields. [0003] The emergence of aluminate long-lasting luminescent materials is the beginning of the development of a new generation of long-lasting luminescent powders. This type of material emits blue-green light after being excited, and the afterglow tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
CPCC09K11/7792
Inventor 海鸥任强武秀兰焦叶辉郑金乐白文妮
Owner SHAANXI UNIV OF SCI & TECH
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